You get a properly sized low value resistance of high accuracy like 1% known resistance say 1 ohm.
Then you place the wire that you want to measure in series with the resistor and place the voltmeter across the resistor.
So if you have a 1 ohm resistor and the meter is reading 1 volt then you have 1 amp flowing in there.
you need to unhook the negative battery cable and set your mutimeter to amps and connect it between the negetive cable and the battery and that will tell you what kind of draw you have just make sure that your multi meter is set up right
You can't measure the current drawn by a car. The current is WAY to high for most meters. Most meters will only measure up to 10Amps. The first guy has the best idea. Get a 1ohm resistor and measure the voltage across it. The voltage measured divided by the resistor value equals the current consumption.
If you have to use a voltmeter the first answer is right just make sure its a 5 or 10 watt resistor at least and don't turn the key definitely.Just measure for current being taken that shouldn't be.
And yes you can use an ammeter to measure the current make sure its on the correct range (1 amp or 10 amp is better) and don't turn the key just check for current being drawn other than the starter and relay.If you turn the key big trouble lol.Probably burn out the meter burn yourself if using a resistor or just not good :) And don't wory about a 1% resistor 5% or 10 % is fine to just get a good idea of the amount of current.
Basically it tells the person doing the draw test how many amps a product is using!Which inturn tells the person doing the test if there is a problem with the items being tested.
your meter must be capable of reading ac current. set it to ac(there will be more than one scale and house current is 115 volt so choose one that is sure to handle that. If you are checking an outlet, insert one probe in each slotted receptacle and read how many volts you have--if any Answer #2 Voltage and current are two different things. You can't check current with a volt meter unless it has a setting to measure current. Even then, you have to have the meter in series with the device being checked. This can be dangerous if you don't know what you are doing. Another safer option is to get a clamp meter which will measure current draw when clamped around ONE wire leading to the device in question.
You will need a test instrument known as a clamp on amp meter. The test instrument clamps around one of the A/C units feed conductors. From the meter face you will read what the actual current is flowing through the feeder conductor.
With a meter you can only test continuity. And if you are not careful you may damage the meter. You may test the coil but additional circuits are required
you need to test with ohm. meter... there are resitance test. and could also be output test using a volt meter. you will need a service manuel to get sepect.....for the corrct make ,model, and year,,,,... what is your problem that your having.....
Remove starter and bench test it for operation and current draw
You would need to put an amp-meter on the circuit to see what the current draw is like. ====== If the compressor is shorted to ground you cannot check the amp draw because it will constantly kill the circuit breaker. A better way to go would be to check the continuity of the compressor to ground and each winding.
A multimeter is used to test an electrical current. The meter is turned to "zero" to begin. The black wire is on a piece of metal to ground it. The red wire then is used to touch the wire in question. If the meter needle moves, there is a current and the meter will show how much current in volts. Multimeters bought in hardware stores should not be used to check current of larger wires.
There is a test procedure for that using an ohm meter. Consult a Chilton's or similar repair manual.
The scale of each meter manufacturer will be different. You'll need to refer to the owners manual to determine the proper setting. Remember that an ammeter is used INLINE with the electrical device to determine current draw. Do NOT put the test leads of an ammeter across the two leads of the service voltage.
using an universal indicator, or you can use litmus paper or a pH meter.
You can try to track the problem by inspecting the wires using a test meter or take it to a repair shop for diagnostic test.
you need to test it with a multi meter, set on the right settings. if you knew the voltage you could get an appropriate light bulb to suit the voltage and put that across the wire to test if there is current.
A continuity test is a simple test, used to determine whether there is a break in a circuit. This can be done, for example, using an ohmmeter which passes current through the circuit from its internal battery -a deflection (analogue meter) or a '000' reading (digital meter) indicates that there is continuity. A continuity test MUST NOT be performed on an energised circuit, as this will likely damage the ohmmeter and present a shock hazard to the user.
If you have the right test equipment amps are the easiest to measure. A slip over the wire amp meter is easier to use than a clamp on amp meter. The other two values have to be measured by using test leads from the test equipment.
Using an AIRFLOW INDICATOR METER TOOL. Baird is one of the brands that make them.
A continuity test is performed using aids. The aids are placed across a chosen path and the flow of the current is checked.
An amp meter can be added in series with the circuit which is difficult in most circumstances of with a clamp on amp meter which is much simpler. A clamp on amp meter measures the magnetic field that surrounds the conductor and converts its strength into a current readout.
A current of 287 microamps, which is 0.000287 amps.
Your question is very confusing. When you say, 'meter', what type of meter? The only safe meter you can connect to a wall outlet is a voltmeter which will measure the actual voltage across the line and neutral (as opposed to the 'nominal' value). Then you bring in the subject of 'Ohm's Law' without explaining what you are trying to find. You need to rephrase the question so that it is clear what you are asking.
Not charging (bad alt) or it has a draw. Something is drawing power which can be anything that takes electricity or the plates in batt are worn out. test it for voltage, then check alt, if alt light not on, search test vehicle elec for current draw to see procedure.
Make sure that the test meter is on the correct voltage scale. Place one lead on one of the conductors to be tested and the other lead on the other voltage source conductor. The reading you obtain will be the voltage potential between the two conductors.
LEARNING OBJECTIVES * How to measure current with a multimeter * How to check a multimeter's internal fuse * Selection of proper meter rangeSCHEMATIC DIAGRAMILLUSTRATIONINSTRUCTIONS Current is the measure of the rate of electron "flow" in a circuit. It is measured in the unit of the Ampere, simply called "Amp," (A). The most common way to measure current in a circuit is to break the circuit open and insert an "ammeter" in series (in-line) with the circuit so that all electrons flowing through the circuit also have to go through the meter. Because measuring current in this manner requires the meter be made part of the circuit, it is a more difficult type of measurement to make than either voltage or resistance. Some digital meters, like the unit shown in the illustration, have a separate jack to insert the red test lead plug when measuring current. Other meters, like most inexpensive analog meters, use the same jacks for measuring voltage, resistance, and current. Consult your owner's manual on the particular model of meter you own for details on measuring current. When an ammeter is placed in series with a circuit, it ideally drops no voltage as current goes through it. In other words, it acts very much like a piece of wire, with very little resistance from one test probe to the other. Consequently, an ammeter will act as a short circuit if placed in parallel (across the terminals of) a substantial source of voltage. If this is done, a surge in current will result, potentially damaging the meter: Ammeters are generally protected from excessive current by means of a small fuse located inside the meter housing. If the ammeter is accidently connected across a substantial voltage source, the resultant surge in current will "blow" the fuse and render the meter incapable of measuring current until the fuse is replaced. Be very careful to avoid this scenario! You may test the condition of a multimeter's fuse by switching it to the resistance mode and measuring continuity through the test leads (and through the fuse). On a meter where the same test lead jacks are used for both resistance and current measurement, simply leave the test lead plugs where they are and touch the two probes together. On a meter where different jacks are used, this is how you insert the test lead plugs to check the fuse: Build the one-battery, one-lamp circuit using jumper wires to connect the battery to the lamp, and verify that the lamp lights up before connecting the meter in series with it. Then, break the circuit open at any point and connect the meter's test probes to the two points of the break to measure current. As usual, if your meter is manually-ranged, begin by selecting the highest range for current, then move the selector switch to lower range positions until the strongest indication is obtained on the meter display without over-ranging it. If the meter indication is "backwards," (left motion on analog needle, or negative reading on a digital display), then reverse the test probe connections and try again. When the ammeter indicates a normal reading (not "backwards"), electrons are entering the black test lead and exiting the red. This is how you determine direction of current using a meter. For a 6-volt battery and a small lamp, the circuit current will be in the range of thousandths of an amp, or milliamps. Digital meters often show a small letter "m" in the right-hand side of the display to indicate this metric prefix. Try breaking the circuit at some other point and inserting the meter there instead. What do you notice about the amount of current measured? Why do you think this is? Re-construct the circuit on a breadboard like this: Students often get confused when connecting an ammeter to a breadboard circuit. How can the meter be connected so as to intercept all the circuit's current and not create a short circuit? One easy method that guarantees success is this: * Identify what wire or component terminal you wish to measure current through. * Pull that wire or terminal out of the breadboard hole. Leave it hanging in mid-air. * Insert a spare piece of wire into the hole you just pulled the other wire or terminal out of. Leave the other end of this wire hanging in mid-air. * Connect the ammeter between the two unconnected wire ends (the two that were hanging in mid-air). You are now assured of measuring current through the wire or terminal initially identified. Again, measure current through different wires in this circuit, following the same connection procedure outlined above. What do you notice about these current measurements? The results in the breadboard circuit should be the same as the results in the free-form (no breadboard) circuit. Building the same circuit on a terminal strip should also yield similar results: The current figure of 24.70 milliamps (24.70 mA) shown in the illustrations is an arbitrary quantity, reasonable for a small incandescent lamp. If the current for your circuit is a different value, that is okay, so long as the lamp is functioning when the meter is connected. If the lamp refuses to light when the meter is connected to the circuit, and the meter registers a much greater reading, you probably have a short-circuit condition through the meter. If your lamp refuses to light when the meter is connected in the circuit, and the meter registers zero current, you've probably blown the fuse inside the meter. Check the condition of your meter's fuse as described previously in this section and replace the fuse if necessary.
When it is your hands you test using a ohm meter and by moving the float, if the reading change a in a smooth manner as you move the float its probably ok.